SpaceAtlas Space Object Data
NASA JPL SBDB · 2014 SD145

2014 SD145

2014 SD145 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.261 AU it takes 1.42 yr to circle the Sun.

Apollo Observations: 51
Orbital Period · P
1.42 yr
v(q)
32.4 km/s
v(Q)
21.7 km/s
Diameter · ≈
0.01 km
TJ
5.08
Eccentricity · e
0.1973

Orbit and dynamics

Between its closest point (1.012 AU) and its farthest (1.51 AU), the heliocentric distance changes by 0.498 AU over every revolution.

One full revolution takes 1.42 yr (517 days), computed from the semi-major axis of 1.261 AU.

An eccentricity of 0.197 makes the orbit moderately elongated.

The orbital plane is tilted 7.24° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.4 km/s at perihelion and falls to 21.7 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 26.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 51 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3432 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

About these computed values

Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Orbital Parameters

Semi-Major Axis
1.261 AU
Eccentricity
0.1973
Perihelion
1.012 AU
Aphelion
1.509795 AU
Inclination
7.24°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
103.37°

Orbit diagram

The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.

3D orbit (interactive)

Drag to rotate; scroll or pinch to zoom. The Sun is at the focus (orange), Earth's orbit is the grey ring at 1 AU, and the red dot marks the object's current position.

Close approaches

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2038-May-24 19:28 0.343009 AU
51313367 km
5.05 km/s
2038-Oct-25 19:09 0.299660 AU
44828530 km
12.78 km/s
2042-Jan-31 12:48 0.465590 AU
69651255 km
7.76 km/s
2045-Apr-15 13:31 0.462590 AU
69202472 km
7.87 km/s
2048-Jul-25 00:40 0.295094 AU
44145485 km
11.83 km/s
2048-Dec-20 09:10 0.340217 AU
50895783 km
4.58 km/s
2055-Oct-01 17:53 0.011169 AU
1670925 km
5.59 km/s
2062-Apr-30 01:16 0.422067 AU
63140305 km
7.06 km/s
2065-Jul-17 00:10 0.376134 AU
56268845 km
15.33 km/s
2066-Jan-05 07:39 0.378779 AU
56664511 km
5.95 km/s
2079-Apr-20 23:39 0.433266 AU
64815726 km
7.69 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
26.9

Orbit Quality

RMS
0.34316
Condition
6
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

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